12502420521 has 16 divisors (see below), whose sum is σ = 17248334400. Its totient is φ = 8045847488.

The previous prime is 12502420519. The next prime is 12502420529.

12502420521 is nontrivially palindromic in base 10.

12502420521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12502420521 - 2¹ = 12502420519 is a prime.

It is a super-2 number, since 2×12502420521² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12502420491 and 12502420500.

It is not an unprimeable number, because it can be changed into a prime (12502420529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504595 + ... + 528791.

It is an arithmetic number, because the mean of its divisors is an integer number (1078020900).

Almost surely, 2^12502420521 is an apocalyptic number.

It is an amenable number.

12502420521 is a deficient number, since it is larger than the sum of its proper divisors (4745913879).

12502420521 is a wasteful number, since it uses less digits than its factorization.

12502420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30168.

The product of its (nonzero) digits is 1600, while the sum is 24.

The spelling of 12502420521 in words is "twelve billion, five hundred two million, four hundred twenty thousand, five hundred twenty-one".